Measurement of the Photon Structure Function F_2^gamma at Low x

Abstract

Deep inelastic electron-photon scattering is studied using e+e- data collected by the OPAL detector at centre-of-mass energies sqrt{s_ee} ~ M_{Z^0}. The photon structure function F_2^gamma(x,Q^2) is explored in a Q^2 range of 1.1 to 6.6 GeV/c^2 at lower x values than ever before. To probe this kinematic region events are selected with a beam electron scattered into one of the OPAL luminosity calorimeters at scattering angles between 27 and 55 mrad. A measurement is presented of the photon structure function F_2^gamma(x,Q^2) at <Q^2> = 1.86 GeV^2 and 3.76 GeV^2 in five logarithmic x bins from 0.0025 to 0.2.

13 pages, LaTeX, uses a4p.sty, 3 eps figures included, submitted to Phys. Lett. B

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• Parton Distributions of the Virtual Photon
• Low- and high-mass components of the photon distribution functions
• Measurement of the Proton Structure Function $F_2$ at low $x$ and low $Q^2$ at HERA
• Virtual Photon Strucutre Functions and the Parton Content of the Electron
• Probing the Parton Densities of Virtual Photons at ep Colliders
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Cited by in corpus (11)

• The Photon Structure from Deep Inelastic Electron-Photon Scattering
• Radiatively Generated Parton Distributions of Real and Virtual Photons
• New NLO Parametrizations of the Parton Distributions in Real Photons
• Survey of present data on photon structure functions and resolved photon processes
• A Comprehensive Approach to Structure Functions
• Photon structure studied at an Electron Ion Collider
• The QCD Coupling Constant
• t-channel unitarity and photon cross sections
• Two-photon reactions at high energies
• The Structure of Quasi-Real and Virtual Photons
• Parton Content of Real and Virtual Photons